The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 1980
Filed:
Feb. 23, 1979
Applicant:
Inventor:
William A Huffman, Minneapolis, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, Saint Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; G02F / ;
U.S. Cl.
CPC ...
350349 ; 252299 ; 252408 ; 3503 / ;
Abstract
Liquid crystal compositions containing pleochroic dyes. The pleochroic dyes are substituted anthraquinone dyes containing at least one carbocyclic or heterocyclic group linked to the anthraquinone moiety through a sulfur atom. The dyes are used in guest-host combinations with nematic liquid crystal compositions having positive dielectric anisotropy. Electro-optic devices containing these guest-host combinations are disclosed.
Huffman, William. (1980). Liquid crystal compositions containing pleochroic dye (U.S. Patent No. 4232949). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4232949
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile